More about Skype #Astronomy:

The #Astronomy hashtag is a topic or interest by Skype users.
Users who liked #Astronomy hashtag in People Discovery Engine will be listed in this page.
If you don't want to appear in Skype #Astronomy, remove the hashtag in your People Discovery Engine settings.
In Twitter, hashtag is a word or phrase used to identify messages on specific topic.
Here at Dizkover, hashtag is used to group people in specific topic to help users discover like-minded people.